search for: pthread_create

Hi, I was working on multithreading a cross iteration loop. I want to insert a pthread_create function call and use other pthread functions into my LLVM IR. Issue is how do i get these functions using module->getOrInsertFunction("pthread_create"), since the function might not be there in IR and then insert function calls to these functions. So, crux is how do i call pthread f...

Hi all, We observed that under certain circumstances pthread_create() (libasan implemention) does not return. The conditions are the following: - address sanitizer enabled - main and child thread run on the same CPU (affinity) - real-time scheduling policy for both threads - different scheduling priority values (this includes the case of setting a real-time pol...

...I compile a pthread program using llvmgcc, but when i run pthread.ll, it show: ------------------ [yue at RH9 test]$ llvmgcc pthread.c -o pthread.ll [yue at RH9 test]$ ls pthread pthread.c pthread.ll pthread.ll.bc [yue at RH9 test]$ ./pthread.ll Creating thread 0 WARNING: Cannot resolve fn 'pthread_create' using a dummy noop function instead! ERROR; return code from pthread_create() is -1073745164 [yue at RH9 test]$ -------------------- how to solve the problem? yueqiang 2003/12/24

...29c2ada3 in virThreadPoolWorker >> (opaque=opaque@entry=0x7f412b183ab0) at util/virthreadpool.c:124 >> #3 0x00007f4129c2a078 in virThreadHelper (data=<optimized out>) at >> util/virthread.c:206 >> #4 0x00007f4127033dc5 in start_thread (arg=0x7f411a9d7700) at >> pthread_create.c:308 >> #5 0x00007f4126d6273d in clone () at >> ../sysdeps/unix/sysv/linux/x86_64/clone.S:113 >> >> Thread 16 (Thread 0x7f411a1d6700 (LWP 5789)): >> #0 pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >...

...hread.c:154 #2 0x00007fcf405498a0 in udevEventHandleThread (opaque=<optimized out>) at node_device/node_device_udev.c:1606 #3 0x00007fcf4e17ec02 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 #4 0x00007fcf4ca26494 in start_thread (arg=0x7fcf3a4e8700) at pthread_create.c:333 #5 0x00007fcf4c768acf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 17 (Thread 0x7fcf3b315700 (LWP 14796)): #0 0x00007fcf4c75f67d in poll () at ../sysdeps/unix/syscall-template.S:84 #1 0x00007fcf4c77917e in __poll_chk (fds=<optimized out>, nfds=<optim...

...c(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5 #6 0x00007f2179a8c5f3 in QThread::exec() () from /lib64/libQt5Core.so.5 #7 0x00007f2179a909da in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5 #8 0x00007f2170ccd6ca in start_thread (arg=0x7f2019fa1700) at pthread_create.c:333 #9 0x00007f2178e83f6f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105 Thread 39 (Thread 0x7f201a7a2700 (LWP 7129)): #0 0x00007ffdf5680b12 in clock_gettime () #1 0x00007f2178e92686 in __GI___clock_gettime (clock_id=1, tp=0x7f201a7a19d0) at ../sysdeps/unix/clock_gettime.c:115 #...

...;: /usr/src/asterisk/channel.c:587: undefined reference to `pthread_kill' channel.o: In function `ast_softhangup_nolock': /usr/src/asterisk/channel.c:587: undefined reference to `pthread_kill' pbx.o: In function `ast_async_goto': /usr/src/asterisk/pbx.c:1873: undefined reference to `pthread_create' pbx.o: In function `ast_pbx_outgoing_exten': /usr/src/asterisk/pbx.c:1873: undefined reference to `pthread_create' /usr/src/asterisk/pbx.c:3857: undefined reference to `pthread_create' pbx.o: In function `ast_pbx_outgoing_app': /usr/src/asterisk/pbx.c:3920: undefined reference...

...---------------------------------- [yue at RH9 test]$ ./pthread.ll Error opening '/lib/libpthread.so.0': /lib/libpthread.so.0: symbol _errno, version GLIBC_2.0 not defined in file libc.so.6 with link time reference -load request ignored. Creating thread 0 WARNING: Cannot resolve fn 'pthread_create' using a dummy noop function instead! ERROR; return code from pthread_create() is -1073747260 ---------------------------------------------------- then try to run with "--load=/usr/lib/libpthread.so", it shows: -------------------------------------------------- [yue at RH9 test]$ ./p...

...e to ask... I'm catching too much noise from dumps. I'm building LLVM 7.0 using release tarballs on OS X 10.5 PowerPC. I'm building out-of-tree mostly following https://llvm.org/docs/GettingStarted.html#getting-started-quickly-a-summary . Cmake gets this far and hangs: -- Looking for pthread_create in pthread -- Looking for pthread_create in pthread - found -- Looking for __cxa_throw in c++ -- Looking for __cxa_throw in c++ - not found -- Looking for __cxa_throw in stdc++ -- Looking for __cxa_throw in stdc++ - found The Cmake script does not appear to move on to other tests like "-- Loo...

...solver state of each input file in the group by the linkingcontext. lld -flavor gnu main.o thread.o --start-group libc.a libpthread.a --end-group function.o main.o has atoms ------------------------ main (defined) printf(undefined) fn(undefined) thread.o has atoms ----------------------------- pthread_create (undefined) libc.a(printf.o) has atoms ------------------------------------ printf(defined) libc.a(exit.o) has atoms ---------------------------------- exit(defined) libpthread.a has atoms --------------------------------- pthread_create(defined) exit(undefined) function.o has atoms -----------...

...ntext. > > lld -flavor gnu main.o thread.o --start-group libc.a libpthread.a > --end-group function.o > > main.o has atoms > ------------------------ > main (defined) > printf(undefined) > fn(undefined) > > thread.o has atoms > ----------------------------- > pthread_create (undefined) > > libc.a(printf.o) has atoms > ------------------------------------ > printf(defined) > > libc.a(exit.o) has atoms > ---------------------------------- > exit(defined) > > libpthread.a has atoms > --------------------------------- > pthread_create(d...

Hi Nick: Thanks for pointing me to libffi. Recompile LLVM with libffi does solve the problem of printf. But it still has other problems: 1) sinf() returns 0 in the interpreter, but returns correct value in JIT (see hellosin.c) 2) calling pthread_create cause lli to crash in the interpreter mode, but no problem in JIT (see phello.c). My questions are: i) can I call any arbitrary external function in the interpreter? ii) how do I specify the dynamic library (where the external function is implemented), when I call the interpreter? Thanks Xu hell...

...39;ve been googling and not finding much that is helpful. At work I've got a multi-threaded program targeted at Linux. It compiles on RHEL 2.1 and 3, and is targeted at 2.1, 3, and 4. UP until today, the binary built on 3 has worked fine on 4. But on RHEL4 update 4 it dies a horrible death in pthread_create. I have reproduced the problem on Centos 4.4, where I am tyring to debug it. I thought it might be some newly-introduced binary incompatibility in the U4 update, so I recompiled it on Centos 4.4, and it does the same thing. This code has been running for 5 years both in-house and at dozens of cus...

...essEventsAndWaitForMore() () from /usr/lib64/libQt5Quick.so.5 #5 0x00007fe0c961b93a in QSGRenderThread::run() () from /usr/lib64/libQt5Quick.so.5 #6 0x00007fe0c585daf8 in QThreadPrivate::start(void*) () from /usr/lib64/libQt5Core.so.5 #7 0x00007fe0c49f759b in start_thread (arg=0x7fdffa0eb700) at pthread_create.c:463 #8 0x00007fe0c5151a1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 10 (Thread 0x7fdffa8ec700 (LWP 9698)): #0 0x00007fe0c49fd56c in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x564e66f04e34) at ../sysdeps/unix/sysv/linux/futex-internal...

...90) at util/virthread.c:154 #2 0x00007f4129c2ada3 in virThreadPoolWorker (opaque=opaque@entry=0x7f412b183ab0) at util/virthreadpool.c:124 #3 0x00007f4129c2a078 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 #4 0x00007f4127033dc5 in start_thread (arg=0x7f411a9d7700) at pthread_create.c:308 #5 0x00007f4126d6273d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113 Thread 16 (Thread 0x7f411a1d6700 (LWP 5789)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007f4129c2a2e6 in virCondWait (c=c@entry=0x7f412...

...his too. ==> if-bench.cc <== #include <pthread.h> #include <unistd.h> extern int foo(int); extern void bar(int); #ifndef N #define N (1UL << 30) #endif void *Thread(void *p) { for (long i = 0; i < N; i++) foo(0); return 0; } int main() { pthread_t t[3]; pthread_create(&t[0], 0, Thread, 0); pthread_create(&t[1], 0, Thread, 0); pthread_create(&t[2], 0, Thread, 0); for (long i = 0; i < N; i++) bar(i); pthread_join(t[0], 0); pthread_join(t[1], 0); pthread_join(t[2], 0); } ==> g.cc <== int g; int foo(int cond) { if (cond)...

...t;io_rx_lock, NULL); + int i; - pthread_cond_init(&ndev->io_tx_cond, NULL); - pthread_cond_init(&ndev->io_rx_cond, NULL); + for (i = 0; i < ndev->vq_num; i++) { + pthread_mutex_init(&ndev->io_lock[i], NULL); + pthread_cond_init(&ndev->io_cond[i], NULL); + } - pthread_create(&ndev->io_tx_thread, NULL, virtio_net_tx_thread, ndev); - pthread_create(&ndev->io_rx_thread, NULL, virtio_net_rx_thread, ndev); + for (i = 0; i < ndev->vq_num; i += 2) { + pthread_create(&ndev->io_thread[i], NULL, virtio_net_tx_thread, ndev); + pthread_create(&ndev...

...t;io_rx_lock, NULL); + int i; - pthread_cond_init(&ndev->io_tx_cond, NULL); - pthread_cond_init(&ndev->io_rx_cond, NULL); + for (i = 0; i < ndev->vq_num; i++) { + pthread_mutex_init(&ndev->io_lock[i], NULL); + pthread_cond_init(&ndev->io_cond[i], NULL); + } - pthread_create(&ndev->io_tx_thread, NULL, virtio_net_tx_thread, ndev); - pthread_create(&ndev->io_rx_thread, NULL, virtio_net_rx_thread, ndev); + for (i = 0; i < ndev->vq_num; i += 2) { + pthread_create(&ndev->io_thread[i], NULL, virtio_net_tx_thread, ndev); + pthread_create(&ndev...

...RIGIN/../lib" lib/libLLVMCodeGen.so.6.0.0svn lib/libLLVMMC.so.6.0.0svn lib/libLLVMOption.so.6.0.0svn lib/libLLVMSupport.so.6.0.0svn lib/libLLVMTarget.so.6.0.0svn && : /usr/bin/../lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/thread:137: error: undefined reference to 'pthread_create' /usr/bin/../lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/thread:137: error: undefined reference to 'pthread_create' clang: error: linker command failed with exit code 1 (use -v to see invocation) [722/979] Building X86GenInstrInfo.inc... I'm currently at r315954....

...ad.o --start-group libc.a libpthread.a >> --end-group function.o >> >> main.o has atoms >> ------------------------ >> main (defined) >> printf(undefined) >> fn(undefined) >> >> thread.o has atoms >> ----------------------------- >> pthread_create (undefined) >> >> libc.a(printf.o) has atoms >> ------------------------------------ >> printf(defined) >> >> libc.a(exit.o) has atoms >> ---------------------------------- >> exit(defined) >> >> libpthread.a has atoms >> -----------...